<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="提交审核"/>
    </el-steps>
    <div>
      <!--      //添加章节-->
      <el-button type="text" @click="dialogChapterFormVisible = true">添加章节</el-button>
      <!-- 添加和修改章节表单 -->
      <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
          <el-form-item label="章节标题">
            <el-input v-model="chapter.title"/>
          </el-form-item>
          <el-form-item label="章节排序">
            <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
          </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
          <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
          <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
      </el-dialog>

      <!-- 章节 -->
      <ul class="chanpterList">
        <li
          v-for="chapter in chapterNestedList"
          :key="chapter.id">
          <p>
            {{ chapter.title }}
            <span class="acts">
            <el-button type="text" @click="dialogVideoFormVisible = true;chapterId =chapter.id">添加课时</el-button>
            <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
            <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
            </span>
          </p>
          <!-- 小节 -->
          <ul class="chanpterList videoList" style="overflow: hidden">
            <li
              v-for="video in chapter.children"
              :key="video.id">
              <p>{{ video.title }}
                <span class="acts">
                <el-button type="text">编辑</el-button>
                <el-button type="text" @click="deleteVideo(video.id)">删除</el-button>
                </span>
              </p>
            </li>
          </ul>
        </li>
      </ul>
    </div>
    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :limit="1"
            class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传
              </div>
              <i class="el-icon-question"/>
            </el-tooltip>
          </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary"
                   @click="saveOrUpdateVideo">确 定
        </el-button>
      </div>
    </el-dialog>
    <el-form label-width="120px">
      <el-form-item>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下
          一步
        </el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
  import chapter from "../../api/teacher/chapter";
  import video from "@/api/teacher/video";

  export default {
    created() {
      if (this.$route.params.id && this.$route.params) {
        this.courseId = this.$route.params.id
        this.getChapterVideoFn(this.courseId)
      }
    },
    data() {
      return {
        fileList: [],//上传文件列表
        BASE_API: process.env.BASE_API,// 接口API地址
        saveVideoBtnDisabled: false, // 课时按钮是否禁用
        dialogVideoFormVisible: false, // 是否显示课时表单
        chapterId: '', // 课时所在的章节id
        video: {// 课时对象
          title: '',
          sort: 0,
          free: 0,
          videoSourceId: '',
          videoOriginalName: ''
        },
        chapterNestedList: [],
        courseId: '',
        saveBtnDisabled: false, // 保存按钮是否禁用
        dialogChapterFormVisible: false, //是否显示章节表单
        chapter: {// 章节对象
          title: '',
          sort: 0,

        }
      }
    },

    methods: {
      handleVodRemove() {
        video.deleteAliyunvod(this.video.videoSourceId).then(res => {
          this.video.videoSourceId = ''
          this.video.videoOriginalName = ''
          this.fileList = []
          this.$message({
            type: 'success',
            message: res.message
          })
        })
      },
      beforeVodRemove(file, fileList) {
        return this.$confirm(`确定删除${file.name}?`)
      },
      handleVodUploadSuccess(response, file, fileList) {
        this.video.videoSourceId = response.data.videoId
        this.video.videoOriginalName = file.name
      },
//视图上传多于一个视频
      handleUploadExceed(files, fileList) {
        this.$message.warning('想要重新上传视频，请先删除已上传的视频')
      },
      deleteVideo(id) {
        console.log(id)
        video.deleteVideo(id).then(res => {

          this.getChapterVideoFn(this.courseId)

          return this.$message({
            type: 'success',
            message: '删除成功!'
          })
        })
      },
      saveOrUpdateVideo() {
        this.video.courseId = this.courseId
        this.video.chapterId = this.chapterId
        video.addVideo(this.video).then(res => {
          this.dialogVideoFormVisible = false
          this.video = {}
          this.fileList = []
          this.getChapterVideoFn(this.courseId)

          return this.$message({
            type: 'success',
            message: '保存成功!'
          })
        }).catch(err => {
          console.log(err)
        })
      },
      removeChapter(id) {
        chapter.deleteChapter(id).then(res => {
          this.getChapterVideoFn(this.courseId)
          return this.$message({
            type: 'success',
            message: '删除成功!'
          })

        })
      },
      openEditChapter(id) {
        console.log(id)
        this.dialogChapterFormVisible = true
        chapter.getChapter(id).then(res => {
          this.chapter = res.data.chapter
        })
      },
      saveChapterFn() {
        this.chapter.courseId = this.courseId
        chapter.addChapter(this.chapter).then(res => {
          this.dialogChapterFormVisible = false
          this.getChapterVideoFn(this.chapter.courseId)
          this.chapter.title = ''
          this.chapter.sort = 0
          return this.$message({
            type: 'success',
            message: '保存成功!'
          })
        })
      },
      UpdateChapterFn() {
        chapter.updateChapter(this.chapter).then(res => {
          this.dialogChapterFormVisible = false
          this.getChapterVideoFn(this.chapter.courseId)
          this.chapter.title = ''
          this.chapter.sort = 0
          return this.$message({
            type: 'success',
            message: '修改成功!'
          })
        })
      },
      saveOrUpdate() {
        if (!this.chapter.id) {
          this.saveChapterFn()
        }
        this.UpdateChapterFn()
      },
      getChapterVideoFn(id) {
        chapter.getAllChapterVideo(id).then(res => {
          this.chapterNestedList = res.data.allChapterVideo
        })
      },
      previous() {
        console.log('previous')
        this.$router.push({path: `/edu/course/info/${this.courseId}`})
      },
      next() {
        console.log('next')
        this.$router.push({path: `/edu/course/publish/${this.courseId}`})
      }
    }
  }
</script>
<style scoped>
  .chanpterList {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .chanpterList li {
    position: relative;
  }

  .chanpterList p {

    font-size: 20px;
    margin: 10px 0;
    padding: 10px;
    height: 70px;
    line-height: 50px;
    width: 100%;
    border: 1px solid #DDD;
  }

  .chanpterList .acts {
    float: right;
    font-size: 14px;
  }

  .videoList {
    padding-left: 50px;
  }

  .videoList p {
    float: left;
    font-size: 14px;
    margin: 10px 0;
    padding: 10px;
    height: 50px;
    line-height: 30px;
    width: 100%;
    border: 1px dotted #DDD;
  }

</style>
